Antananarivo (Cultural) - 18
Babylon (Scientific) - 11
Kabul (Militaristic) - 18 (21 - 3) Promotions help win wars, but major development advantages help more.
Kumasi (Cultural) - 23
Stockholm (Scientific) - This CS means 50-100% more great person points in the pivotal early game, and even after tier 3 buildings come online, it's still +25% in most categories. If that isn't enough of a bonus to seriously impact great person races, you're either winning or losing decisively enough that no CS would make a difference.
Zanzibar (Trade) - 26